A composable, observable, and performant configuration management library for Go designed for distributed systems.
Konfig is a configuration management library for Go designed for larger distributed systems where configuration may come from multiple dynamic sources. It provides a flexible, extensible approach to loading, watching, and managing configuration with hot reload capabilities, making it suitable for highly dynamic environments.
Go developers building distributed systems or microservices that require dynamic configuration from sources like Vault, Etcd, Consul, files, HTTP endpoints, environment variables, and command-line flags.
Developers choose Konfig for its high performance (up to 10x faster than Viper with zero allocations on reads), modular design based on small interfaces for extensibility, and built-in observability with Prometheus metrics for monitoring reload events and durations.
Composable, observable and performant config handling for Go for the distributed processing era
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Benchmarks show reads are up to 10x faster than Viper with zero allocations on read operations, crucial for high-throughput distributed systems.
Based on small, composable interfaces for loaders, watchers, parsers, and closers, allowing custom pipelines and avoiding vendor lock-in, as emphasized in the philosophy.
Built-in Prometheus metrics track reload events and durations, providing monitoring for dynamic environments without extra setup.
Supports binding configuration to Go structs with tags for type-safe access, reducing runtime errors in complex applications.
Requires understanding and configuring multiple interfaces (e.g., loaders, watchers, hooks) even for basic use, unlike more opinionated libraries.
The composable design and advanced features like struct binding with prefix matching can be overwhelming for developers new to dynamic configuration.
As a newer project, it has fewer community-contributed loaders and integrations compared to established alternatives like Viper.
konfig is an open-source alternative to the following products: